Section 10 - Adjusting Manifold Pressure & %Hp - J.P. Instruments EDM-900 Pilot's Manual

Section 10 - Adjusting Manifold Pressure & %HP
Adjusting the HP Constant for Rich of Peak Operation
To fine tune the %HP readout, follow this procedure airborne between
5,000 and 8,000 feet MSL. (note: Verify that the MAP adjustment has
been perform prior to this process).
1. Enter the pilot program mode by simultaneously holding the STEP
and LF buttons for five seconds.
2. Tap STEP repeatedly until you see HP Constant. Hold both NEXT
and Button 2 until you see PLUS and MINUS appear in status bar.
Now HP Constant 120 should appear. Hold both NEXT and Button 2
until you see ADJUST momentarily.
3. Set the MP and RPM per your POH to 70 percent power. Let
conditions stabilize.
4. Adjust the HP Constant value PLUS or MINUS so that the %HP
reading on the display equals '70 %HP'. Note: this is the percent of
maximum horsepower.
5. Hold both NEXT and Button 2 until you see SET.
Adjusting the MAP
This procedure allows you to adjust the MAP to the altimeter setting at a
sea level airport. NOTE: If airport is not at sea level, use the
correction table on the next page to derive corrected sea level
altimeter setting).
1. Enter the pilot program mode by simultaneously holding the STEP and
LF buttons for five seconds.
2. Tap NEXT repeatedly until you see MAP ADJUSTMENT +0.0. Then
hold both the NEXT and Button 2 until you see ADJUST
momentarily.
3. Adjust the value using the PLUS or MINUS until the value equals the
altimeter setting (sea level airport). The adjustment range for the
MAP is ±3.0 inHg.
4. Hold both NEXT and Button 2 until you see SET.
Page 46 Engine Data Management